Question

If I am given a graph of f'(x), how do I know for which values of f(x) is greater than zero?

Answer 1

Ok when f'(x) is descending/decreasing then for those values of X, f(x) was negative
When f'(x) is ascending/increasing then for those values of X f(x) was was greater than 0
Lemme draw a graph of f(x) and f'(x) to illustrate my point